The US Postal Service “money order” doesn’t connect with Australia for example and thus it seems that Western Union will have to be specified for example in such cases.

PayPal have their own branded pre-paid card which can be “topped-up” using a PayPal account, Pay-Points and at the Post Office. The topping up options of an account is not always something that is easy to find.

Paper Check payment is becoming less common due to electronic card payments